| Abstract Scope |
Over the past few decades, semiconducting chalcogenides sulphides-based (Bi2S3, Cu2-xS, CdS, TiS2, Ag2S etc.) compounds received lot of attentions for thermoelectric applications and have the advantage of having low cost, low toxic, more abundant elements. Various strategies such as doping have been used for improving its TE performance. Here, we report the synthesis and thermoelectric properties of Bi2S3 doped with CdCl2 synthesized by spark plasma sintering. XRD of all the samples show single phase formation. All the compositions exhibit a negative Seebeck coefficient suggesting n-type behavior. The increasing dopant concentration leads to the improvement in its electrical property. As a result, higher power factor ~700μW/m-K2 has been achieved in these composites. Further electron transport and heat transport mechanisms have been evaluated in co-relation with FESEM, XPS and TEM.
Key Words: Chalcogenides, Thermoelectric, Energy Storage, Spark Plasma Sintering |